Improved press for moulding glassware



.and move lroperly u'poii, the usual standards or -ings ot' the cross-head which carries the plunger, as to A are tubular, and made to slide up auddown smoothly me eine .IoHN BIRD, or PHILADELPHIA, PENNSYLVANIA. l

Lette/rs PctentNo. 974,863, dated September 14, A1869.

IMPROVED PRESS POR MOULDING- GLASSWAE.

The Schedule referred to in these Letters Patent and makingpart of thev same,

To all whom, it may concern Be it known that I, .IoHN BIRD, of the city of Phill adelphia, in the Stat-e of Pennsylvania, have invented anew and useful Improvement in the Press for MouldingGl-assware; and I do hereby declare that the following isa full, clear, and exact description of the construction and -operation of the same, reference being had to the accompanying drawings, .making'a part of this specification, iu which- Figure 1 is a perspective View of the said improved press, and Y i p Figure 2, a vertical section ofthe improvement applied; I y l Like letters and numbers of reference indicate the Vsaine parte when in bot-h figures.

i In the operation of the presses inV common use in moulding glassware, there is more or less inaccuracy in the requiredvertical motions of the plunger, and, consequent-ly, objectionable irregularities in the forni andthickness ofthe sides of Aany glass vessel produced thereby, and this inaccuracy in the motions o'f the plunger arises from the supposed necessity of making the lower portions of the guide-bearings of the plungers cross-headvery short, in, order to allowthe bearings in the ends of the lower spring-plate to receive guides. v

'lhe object of my improvement is to obviateI or prevent this inaccuracy in. the motions of the plunger; and4 also to facilitate in the repair or renewal of" Vthe bearings of thesaid moss-head; and

My invention consists, substantially as hereinafter described, in` so constructing and applying the bea allow the bearings of the lower springplate to fit around and slide upon the outside of the lower bearings` of the said cross-head, instead of sliding directly upon the guides or standardsas heretofore, thesaid lower bearings of the cross-head being elongated downward for the purpose of affording the accuracy required in 'the motions of the cross-head, and also adapted, in construction and application, for the removal and reapplication,with facility, of the bearings of the cross-heath as occasion may require.

Referring to the drawings- A A are the usual standards or bearingguidesof the press, securedin positions perpendicular to the. platform a; l

B, the cross-head;

` l/ b', its lower bearings; and

b b", its upper bear-ings.

D, the operating-shaft of the cross-head B; and

E, the lower spring-plate.

In each end of the cross-head B, there is a roomy hole, which allows the cross-head to be easily slipped down over the standards A A.

The bearings b' b, in each end of the cross-head,

and accurately on their respective standards A A, and each has a dange, 3, around one end, wherebyy it is firmly bolted fast'to the cross-head.

On the'tlanged end of each of vsaid bearings, thereV is a lon gitudinally-projectin g portion, 4, concentiic with its bore, and litting accurately ina corresponding concentric seat, made for the purpose, around in the hole in the cross-head, and the two sets of bearings b b., being thus firmly bolted, respectively,'together with the cross-head between, forni the bearings for the respective ends of the latter.

The tubular portions of the lower hearings b b exi tend downward nearl as low as the lower end of the z y. plunger C, passing through the respective bearings orv holes in the two ends of the lower spring-plate E, and serve as guides whereon the said plate may he accui rately and `smoothly moved up and down as usual dining the operation of the press.

The plunger is adjustably bolted firmly to the un. der side` of the cross-head, at apoint directly beneath the lower end of the shaft D, and simultaneous inotions invertical directions given to the shaft D, crossliead B, plunger C, Vand spring-plate E, in the usual manner, the spriiig-plate E being arrested in its downy Ward inotion Vby coming in contact with the usual Kring of a mould, and thus holding -the said ring firmly down in place on the mould during the pressing of the glass in `the saine, and the withdrawal of the plunger C therefrom.

It will be seen, that as the lower bearings b b of lthe cross-head B are elongated, so asto extend'down below the latter nearly as far as the plunger C, they will, in co-operation with the upper bearings b b and standards. A A, eiectnally prevent any deviation froni the required vertical line of motion of the plunger parallel. with the standards A A, and, therefore, that the said plunger (l will not be subject to the objectioiiable inaccuracies, before stated, in its operation upon the plastic glass in the mould, and that ,the spring-plate E will move as freely and accurately over the surface of the bearings b' b', as, it did before over the surface of the standards A A.

It will also be seen that the bearings b b", in 'consequence of thc projections 4 4 and their seats iu the cross-head, can be readily removed for repair, and re placed, or ncw'ones substituted, so as to I'it aiidserve with perfect accuracy, at trifiing cost.

Having thus fully described-my improvement,

Vhat I claim as new, and desire to secure by Letters Patent, is coni-ined to the following, viz:

I. I claim extending the lower portionof each of `the bearings b l1', downward through and beyond thc spring-plate E, substantiallyin the manner described aiid set forth, for the purpose specified.

2. I also claini the concentric projections 4 4, and the Aflanges 3 3, on the inner ends of the bearings b l1", iii combination with the corresponding concentric vseats around in the holes inthe ends of the cross-4 

